TY - JOUR A1 - Kenfack, F. A1 - Vieth, Siegfried T1 - Synthesis of Eucryptite Spheres Y1 - 2008 ER - TY - CHAP A1 - Vieth, Siegfried A1 - Bauer, Monika A1 - Uhlmann, Marietta T1 - New Polycyanurate Foams for Light Weight Applications T2 - 1. EUCOMAS : conference Berlin, May 26 - 27, 2008 Y1 - 2008 SN - 978-3-18-092028-3 SP - 409 EP - 412 PB - VDI-Verlag CY - Düsseldorf ER - TY - GEN A1 - Vieth, Siegfried A1 - Müller, R. A1 - Bauer, Monika T1 - Composites and Laminates from a Linseed Epoxide Resin and Fly Ash Y1 - 2009 ER - TY - CHAP A1 - Ahlers, Jan A1 - Vieth, Siegfried A1 - Wurzel, R. A1 - Klauke, K. A1 - Höppner, T. A1 - Uhlmann, Marietta A1 - Meinhardt, Petra A1 - Bauer, Monika T1 - Cyanate Ester Resin Based Foams for Light-Weight Structures T2 - Thermosets 2009, Program and Additional Abstracts Y1 - 2009 SP - 30 EP - 31 ER - TY - CHAP A1 - Vieth, Siegfried A1 - Linke, Dietmar A1 - Klemm, Ulrich A1 - Sobek, Dieter T1 - In-Situ Investigation of the Compaction of Surface-Modified Silicon Nitride Powders T2 - Euro Ceramics VII, Proceedings of the 7th Conference & Exhibition of the European Ceramic Society Brugge, Belgium, September 9-13, 2001, Part 1, Sessions P1, P2, P3, G1 KW - dry pressing KW - instrumented compacting tool KW - silane modification KW - silicon nitride powders Y1 - 2002 SN - 0-87849-882-6 SP - 103 EP - 106 PB - Trans Tech Publ. CY - Uetikon-Zürich [u.a.] ER - TY - GEN A1 - Vieth, Siegfried T1 - A Simple Dye Test for Mineral Powders T2 - Ceramic forum international : cfi ; Berichte der Deutschen Keramischen Gesellschaft N2 - Powders are typical starting materials for the production of ceramics. In this paper, a strategy is presented, that allows a quick quality control of inorganic powders. This strategy bases on dyes. Dye adsorption as well as the usage of indicators allow an easy and cheap characterisation of powders. Furthermore, the tests provide information on the chemical behaviour of the powders. It can be shown, that there is a coherence between the results of colour tests of a powder and the influence on the properties of ceramics (prepared from this powder). Ceramic powders suffer from perpetual changes mainly by two reasons. First, due to their large surface powders show interactions with components of the atmosphere (e.g. water, carbon dioxide, oxygen). A further problem arises, if natural sources are the origin of powders: The material can have tremendous changes in the chemical composition causing serious problems in the production of ceramics. That’s why quality control of powders is a must. Unfortunately, the methods used are expensive and time consuming (e.g. BET, EDX, XPS, ICP). In particular, smaller companies have only limited opportunities to control the quality of their starting powders. In this paper a simple, quick and inexpensive method is suggested, which bases on dyes and allows a control of powder quality. KW - mineral powder KW - quality control dye KW - indicator Y1 - 2020 UR - https://www.cfi.de/technology-materials/materials-additives-mixes?page=1&news_id=11797&news_title=A+Simple+Dye+Test+for+Mineral+Powders&page=2 SN - 0173-9913 VL - 97 IS - 5-6 SP - E 25 EP - E 29 ER -